.adv_nav1_part1,.adv_nav1_part2,.adv_nav1_part3,.adv_nav1_part4{
  width: 1200px;
  margin: 0 auto;
  line-height: 24px;
  font-size: 16px;
}
/* 光触媒 */
.adv_nav1_part1{  
  background-color: #f0f0f0;
  padding-right: 90px;
  padding-left: 90px;
  padding-top: 52px;
  padding-bottom: 40px;
  box-sizing: border-box;
  margin-bottom: 70px;
}
.adv_title{
  display: flex;
  border-bottom: 1px solid #7d7d7d;
  padding-bottom: 5px;
  margin-bottom: 10px;
}
.adv_title i{
  width: 12px;
  height: 12px;
  border: 3px solid #4d80df;
  border-radius: 50%;
  margin-right: 20px;
  align-self: center;
}
.adv_title h2{
  font-size: 24px;
  letter-spacing: 12px;
}
.adv_nav1_part1 p {
  color: #707070;
  /* text-indent: 2em; */
}
.adv_nav1_part1 p span{
  color:#4d80df;
}
.adv_nav1_part2{
  display: flex;
  justify-content: flex-end 
}
.adv_nav1_part2 .nav1_part2_l{
  padding-right: 40px; 
  padding-top: 15px;
}
.adv_nav1_part2 .nav1_part2_l p{
  color:#7c7c7c;
}
.adv_nav1_part2 .nav1_part2_l p:nth-child(2){
  margin-top:40px;
  margin-bottom:10px;
}
/* .adv_nav1_part2  .adv_nav1_img1{
  width: 597px;
  overflow: hidden;
}
.adv_nav1_part2 .adv_nav1_img1 img{
  transition: all 1s;
}
.adv_nav1_part2 .adv_nav1_img1 img:hover{
  transform: scale(1.2);
} */
.adv_nav1_part2 .nav1_part2_r{
  width: 597px;
  height: 267px;  
}
.adv_nav1_part3{
  margin-top: 70px;
}

.adv_swiper{
  width: 1025px;
  margin: 70px auto;
  position: relative;
}
.swiper-button-next{
  right: -88px;
  background: url(../images/adv_next.png) no-repeat; 
  width: 36px;
  height: 70px;
  background-size: 100%;
  opacity: 0.7;
}
.swiper-button-prev{
  left: -88px;
  background: url(../images/adv_prev.png) no-repeat;
  width: 36px;
  height: 70px;
  background-size: 100%;
  opacity: 0.7;
}
.swiper-button-next:hover,.swiper-button-prev:hover{
  opacity: 1;
}

.adv_nav1_part4{
  padding-bottom: 40px;
  background-color: #f0f0f0;
  padding-right: 90px;
  padding-left: 90px;
  padding-top: 52px;
  box-sizing: border-box;
  margin-top: 70px;
}
.adv_nav1_part4 p{
  color:#7e7e7e;
}

.adv_nav1_part4 p:nth-child(2){
  color: #4d80df;
  margin-top: 25px;
  margin-bottom: 10px;
}
.adv_nav1_part4 p:nth-child(3){
  margin-bottom: 25px;
}
.adv_nav1_part4 p:nth-child(4){
  color: #4d80df;
  margin-bottom: 10px;
  line-height: 18px;
}

/* 安全除醛 */
.adv_nav2_part1,.adv_nav2_part2{
  width: 1200px;
  margin: 0 auto;
  padding-right: 90px;
  padding-left: 90px;
}

.adv_nav2_part1{
  display: flex;
  justify-content: space-between;
  box-sizing: border-box;
  margin-bottom: 90px;
  padding-right: 0px;
}
.adv_nav2_part2{
  background-color: #f0f0f0; 
  padding-top: 52px;
  box-sizing: border-box;
}
.adv_nav2_part2 .adv_title{
  justify-content: center;
}
.adv_nav2_part2 .adv_nav2_c{
  font-weight: bold;
  margin-top: 20px;
  margin-bottom: 25px;
  color: #4d80df;
  text-align: center;
}
.adv_nav2_part2 .adv_nav2_f{
  font-size: 14px;
  line-height: 20px;
  color: #4d80df;
  margin-bottom: 15px;
}
.adv_nav2_part2 .adv_nav2_js{
  line-height: 24px;
  font-size: 16px;
  color: #5e5e5e;
  margin-bottom: 50px;
  padding-bottom: 50px;
}
.adv_nav2_part2 .adv_nav2_js p{
  font-weight: bold;
  margin-bottom: 10px;
}
.adv_nav2_part3{
  width: 1200px;
  margin: 0 auto;
  
}
.adv_nav2_part3 .adv_nav2_img{
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}
.adv_nav2_part3 .adv_nav2_img{
  margin-top: 20px;
}
.adv_nav2_part3 .adv_nav2_img img{ 
  margin-bottom: 20px;
}

.bg_h{
  height: 60px;
  width: 1200px;
  margin: 10px auto 0;
  background-color: #f0f0f0;
}


/* 技术支持 永不反弹 */
.adv_nav3,.adv_nav4{
  width: 1200px;
  margin: 0 auto;
  background-color: #f0f0f0;
  padding: 40px 90px;
  box-sizing: border-box;
}
.adv_nav3 .adv_nav3_title{
  margin-bottom: 65px;
}
.adv_nav3 .adv_nav3_title p{
  font-size: 16px;
}
.adv_nav3 .adv_nav3_title i{
  display: block;
  width: 15%;
  border-bottom: 1px solid #616161;
  margin: 10px 0 15px;
}
.adv_nav3 .adv_nav3_title h3{
  font-size: 22px;
}
.adv_nav3 .adv_nav3_title h3 span{
  color: #4d80df;
}

.adv_nav3 .adv_nav3_cont{
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.adv_nav3 .adv_nav3_cont .adv_nav3_l{
  margin-right: 60px;
}
.adv_nav3 .adv_nav3_cont .adv_nav3_r p{
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 30px;
  color: #7c7c7c;
}

/* 技术优势 OR除臭 */
.adv_nav4 .adv_nav4_img{
  margin-bottom: 50px;
}
.adv_nav4 .adv_nav4_title{
  color: #4d80df;
  margin-bottom: 30px;
}
.adv_nav4 .adv_nav4_title h2{
  font-size: 56px;
  margin-bottom: 10px;
}
.adv_nav4 .adv_nav4_title p{
  font-size: 16px;
  letter-spacing: 13px;
}
.adv_nav4 .adv_nav4_cont{
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.adv_nav4 .adv_nav4_cont .adv_nav4_l{
  line-height: 24px;
  font-size: 16px;
  color: #5f5e5e;
  width: 570px;
  margin-right: 40px;
}
.adv_nav4 .adv_nav4_cont .adv_nav4_l p{
  margin-bottom: 10px;
}
